발간논문

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Vol.31, No.5, 658 ~ 666, 1993
Title
Electrochemical Behaviour of Surface Treated Steel Sheets applied by A . C . Impedance Technique
송연균Yon Gyun Song, 김형준Hyung Joon Kim
Abstract
Corrosion resistance of various surface treated steel sheets through A.C. impedance technique was examined and also compared with that obtained from salt spray test. A.C. impedance spectra was measured from 10 m ㎐ to 10000 ㎐ with applied amplitude of ± 10 mV at the open circuit potentual in 0.2% NaCl solution. Several equivalent circuits for surface treated steel sheets could be suggested from A.C. impedance spectra and the value of Rp(polarisation resistance) in equivalent circuits was used to evaluate corrosion resistance in this study. Thus, it could be determined that A.C. impedance technique is the simple and exact evaluation method for surface treated steel sheet in comparison with results of salt spray test.
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